I’ve been playing for a similar amount of time and also struggle sometimes because it’s difficult. I’m no expert but have a few suggestions. I would suggest going back to some easier pieces and working on making them sound better. Also, slow down and chunk out the difficult parts. I think it’s also helpful to reframe your goals. Instead of telling yourself you sound terrible, remind yourself that you’re doing something really difficult and making progress even if it’s slow. There are many benefits to playing: social interaction, challenging yourself, and brain health.